Quectel M12

M12 Hardware Design
M12_Hardware_Design_V3.3 - 48 -
SPK1P
SPK1N
Differential layout
Amplifier
circuit
Module
10pF
0603
Close to speaker
GND
ESD
33pF
0603
33pF
0603
GND
10pF
0603
ESD
10pF
0603
33pF
0603
Figure 29: Reference design with an amplifier for AOUT1
Texas Instruments TPA6205A1 is recommended for a suitable differential audio amplifier. There
are plenty of excellent audio amplifiers in the market.
SPK2P
AGND
Differential layout
Module
22uF
Close to speaker
GND
ESD
33pF
0603
10pF
0603
Figure 30: Reference design for AOUT2
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